Facebook has huge overheads because most of their engineering time is spent on all the creepy privacy violating things they develop and the infrastructure to run them.
If we start from scratch without all that it would be possible to make a profitable social network for a couple of bucks per month per user (or a tiered system, so heavy users or “influencers” would pay more while the base tier remains free).
I'm not the parent, but from my pov FB is a net negative for society, so if they are unwilling to play by our laws, then I'd rather see them get the fuck out.
They won't of course, because it leaves the market open for grabs.
If they leave the EU though they don't need to follow European laws or pay European taxes, but that doesn't prevent European users from continuing to use the actual website.
There was a study recently showing that people that do not have Facebook account are happier :) Not to mention their personal data are not being abused.
i don't use facebook and i do agree its bad for egopaths. But i have some friends who use it to communicate with their family back in their countries and it's a valuable service for that reason.